Monoubiquitination of FANCD2 induces localization of FANCD2 to sites of DNA damage, where it interacts with BRCA1 (4). FANCJ/BRIP1, FANCD1/BRCA2, and FANCN/PALB2 are also recruited to sites of DNA damage. FA signaling is important in maintenance of chromosome stability and control of mitosis (3).